Question

As little as ______ concentration of carbon monoxide (CO) in the blood will cause a decrease in peripheral vision and night vision

A) 1%
B) 5%
C) 10%
D) 15%

Answer 1

As little as 5% concentration of carbon monoxide in the blood can lead to a decrease in peripheral and night vision, due to its high affinity for hemoglobin over oxygen.

Step-by-step explanation:

Breathing in carbon monoxide (CO) can have serious health effects by reducing oxygen delivery to the body's organs and tissues. The affinity of CO for hemoglobin is 200 times greater than that of oxygen, meaning it can displace oxygen and form carboxyhemoglobin. This interference with oxygen transport can notably reduce peripheral and night vision at low concentrations in the blood.

The correct answer to the question is B) 5%. As little as 5% concentration of CO in the blood will cause a decrease in peripheral vision and night vision. This is because even a small concentration of CO in the blood significantly impairs the ability of hemoglobin to transport oxygen throughout the body.